Effect of Hapnanofibers Prepared by Electrospinning Process on the Mechanical Properties of Dental Resins

Neda Jamshidi Shahmirzadi^1*and Seyed Hosein Inanloo²

¹Postgraduate student of Pediatric Dentistry, Islamic Azad University, Dental Branch, Tehran, IRAN ²Assistant Professor, Department of Operative Dentistry, Shahed Dental School, Tehran, Iran

Abstract: The novel bisphenol-A glycidyl methacrylate (Bis-GMA)/triethylene glycol dimethacrylate (TEGDMA) /hydroxyapatite (HAp) nanofibrous dental resins were successfully fabricated and the influence of HApnanofibers with various mass fractions (2, 5, 10 and 20 wt.%) on the mechanical properties of dental resins was investigated. The HApnanofibers were prepared by electrospinning process. The prepared nanofibers were characterized using X-ray diffraction (XRD), scanning electron microscope (SEM), and thermogravimetric analysis (TGA). The average diameter of HApnanofibers was found to be 110 nm. Incorporation of lower loadings of HApnanofibers (2, 5 and 10% wt.%) into the dental resin improved the flexural strength, flexural modulus, compressive strength, and diametral tensile strength of the dental resins; while the higher loading of HAp (20 wt.%) decreased the mechanical properties of dental resins compared with resins containing 10 wt.% HAp.. Therefore, the lower loading of HApnanofibers as novel reinforcing filler can improve the mechanical properties of dental resins.

Keywords: Dental materials; BisGMA; TEGDMA; HApnanofiber; Electrospinning

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